Lead-acid storage battery separator and preparation method thereof

Abstract

The invention discloses a lead-acid storage battery separator which comprises 85-95 percent by weight of superfine glass fibers, 4-10 percent by weight of polyester fibers and 1-5 percent of cellulose acetate fibers. A preparation method comprises the following steps: pulping the superfine glass fibers for 5-10min and then adding the polyester fibers and the cellulose acetate fibers, pulping for 8-12min, forming and beating to enter a drying system at a constant speed, drying at a temperature of 160-2500 DEG C, winding and cutting to obtain the lead-acid storage battery separator. The lead-acid storage battery separator prepared by adopting the preparation method is reasonable in structure; the polyester fibers and the cellulose acetate fibers are added, so that the advantages of insulation, isolation and storage of an acid liquor of an existing AGM separator can be kept, the relatively high mechanical strength, excellent puncture resistance and excellent compression rebound property are obtained, the performance of a storage battery is improved, the service life of the storage battery is prolonged, and the application is relatively wide.

Description

technical field [0001] The invention relates to the field of lead-acid batteries, in particular to a lead-acid battery separator and a preparation method thereof. Background technique [0002] The existing lead-acid battery separators mainly include ultra-fine glass fiber separators (AGM) and PVC and PE separators. Although PVC and PE separators have high mechanical strength and puncture resistance, they cannot absorb and store Acid solution, the tight assembly effect is poor, and the existing AGM separator is made of ultra-fine glass fiber wet sheet, the fibers are interwoven, evenly distributed, and disorderly arranged, and the friction between the fibers and the strength of the monofilament are determined. In addition to the low mechanical strength and poor puncture resistance of the AGM separator, bottom cracking, wet rebound and compression rebound will also appear when cladding the board. During the cyclic use of the battery, due to the frequent high-current discharge...

AI Technical Summary

Problems solved by technology

[0002] The existing lead-acid battery separators mainly include ultra-fine glass fiber separators (AGM) and PVC and PE separators. Although PVC and PE separators have high mechanical strength and puncture resistance, they cannot absorb and store Acid solution, the tight assembly effect is poor, and the existing AGM separator is made of ultra-fine glass fiber wet sheet, the fibers are interwoven, evenly distributed, and disorderly arranged, and the friction between the fibers and the strength of the monofilament are determined. The AGM separator has low mechanical strength and poor puncture resistance, and bottom cracking, wet rebound and compression rebound will also appear when cladding the board.

During the cyclic use of the battery, due to the frequent high-current discharge and vibration of the battery, the repeated shrinkage and expansion of the plate, and the repeated changes in the temperature of the electrolyte, the separator will decompose and drift disorderly, resulting in the penetration of electrolytic lead and dendrite puncture, thus Limits the widespread application of AGM separators in the automotive industry